阅读说明：本技术 无偏载籽晶提升装置 (Seed crystal lifting device without unbalance loading ) 是由 尹嘉琦 约翰·艾伦·里斯 乔尔·克里斯托弗·斯特夫尔 于 2020-12-09 设计创作，主要内容包括：本发明提供一种无偏载籽晶提升装置。本发明包括籽晶绳、卷丝轴、导向轮和动力机构,所述籽晶绳的底端与单晶产品相连,所述籽晶绳的顶端绕过导向轮后缠绕在所述卷丝轴上,所述卷丝轴通过动力机构驱动,所述卷丝轴设置于籽晶提升腔内中央位置,所述籽晶提升腔固定在支撑机构的中心位置,所述籽晶提升腔的底部通过籽晶旋转皮带进行水平面的旋转,所述导向轮用于将卷丝轴设置于旋转中心位置。本发明改变了籽晶绳缠绕方式,将卷丝轴置于旋转中心,无偏载,进而不需要过多额外的配重,籽晶提升装置,整体结构紧凑,总重量降低,更易于单晶炉长期稳定的运行。(The invention provides a seed crystal lifting device without unbalance loading. The seed crystal lifting device comprises a seed crystal rope, a wire winding shaft, a guide wheel and a power mechanism, wherein the bottom end of the seed crystal rope is connected with a single crystal product, the top end of the seed crystal rope winds on the wire winding shaft after bypassing the guide wheel, the wire winding shaft is driven by the power mechanism, the wire winding shaft is arranged at the central position in a seed crystal lifting cavity, the seed crystal lifting cavity is fixed at the central position of a supporting mechanism, the bottom of the seed crystal lifting cavity rotates in the horizontal plane through a seed crystal rotating belt, and the guide wheel is used for arranging the wire winding shaft at the rotating central position. The invention changes the winding mode of the seed crystal rope, arranges the wire winding shaft at the rotating center, has no unbalance loading, further does not need excessive additional balance weight, has compact integral structure and reduced total weight, and is easier for the long-term stable operation of the single crystal furnace.)

1. The utility model provides a no unbalance loading seed crystal hoisting device, its characterized in that includes seed crystal rope, reel spool, leading wheel and power unit, the bottom of seed crystal rope links to each other with the single crystal product, the winding is in after the leading wheel was walked around to the top of seed crystal rope on the reel spool, the reel spool passes through power unit drive, the reel spool sets up in seed crystal promotion intracavity central point and puts, seed crystal promotes the central point that the chamber was fixed at supporting mechanism and puts, the rotation of horizontal plane is carried out through the rotatory belt of seed crystal in the bottom in seed crystal promotion chamber, the leading wheel is used for setting up the reel spool in rotatory central point and puts.

2. The unbiased load seed crystal lifting device according to claim 1, wherein the power mechanism includes a speed reduction motor.

3. The seed crystal lifting device without offset load as claimed in claim 1, wherein the end of the seed crystal rotating belt is connected with a seed crystal rotating motor and a driving roller.

4. The seed crystal lifting device without unbalance loading as defined in claim 1, wherein the guide wheel is at least one, and a plurality of guide wheel sets are formed as a whole, and the left and right ends of the guide wheel are fixedly connected to the seed crystal lifting cavity.

5. The seed crystal lifting device without unbalance loading according to claim 4, characterized in that the ratio coefficient of the diameter of the seed crystal rope to the diameter of the fixed pulley is obtained by calculating the bending life of the seed crystal rope, and the number of the guide wheels in the guide wheel set is further determined.

6. The seed crystal lifting device without unbalance loading as defined in claim 1, wherein the wire winding shaft has a cylindrical cross section and the outer wire groove has a spiral structure.

Technical Field

The invention relates to the technical field of photovoltaic industry, semiconductor industry and straight-pull single crystal furnace equipment, in particular to an unbalance-loading-free seed crystal lifting device.

Background

The Czochralski single crystal furnace is a main device for producing monocrystalline silicon for solar cells, monocrystalline materials for equipment in the semiconductor industry and monocrystalline silicon. With the increasing size demand of photovoltaic industry for solar cell silicon materials and the gradual increase of the quality demand of semiconductor industry equipment for single crystal materials, the corresponding requirements for the specification and long-term stability of single crystal furnaces for producing single crystals are also increasing. In the single crystal furnace equipment, a seed crystal lifting mechanism is a key part and is positioned at the top of the single crystal furnace, and the seed crystal lifting mechanism rotates at a constant speed in the operation process to lift a single crystal product.

The existing universal seed crystal lifting device needs to place the wire winding shaft on one side of a rotation center due to structural limitation, so that a corresponding spline shaft, a reduction gearbox, a motor and the like are eccentric when being positioned on one side of the rotation center, and in order to maintain dynamic balance, a corresponding balancing weight needs to be configured on the centrosymmetric side, so that the center of mass is positioned at the rotation center, and the weight of the total device is very high. When the seed crystal lifting mechanism is heavier, the gravity center is not positioned at the rotating center, the dynamic balance failure can be caused, the total weight of the rotating part is higher, the dynamic balance failure can be amplified and accelerated, the stability in the growth process of the single crystal is further reduced, and the quality of the single crystal product is reduced.

Disclosure of Invention

In view of the above-mentioned technical problems, an off-load-free seed crystal lifting device is provided. The technical means adopted by the invention are as follows:

the utility model provides a no unbalance loading seed crystal hoisting device, includes seed crystal rope, reel spool, leading wheel and power unit, the bottom of seed crystal rope links to each other with the single crystal product, the winding is in after the leading wheel was walked around to the top of seed crystal rope on the reel spool, the reel spool passes through power unit drive, the reel spool sets up in seed crystal promotion intracavity central point and puts, the seed crystal promotes the central point that the chamber was fixed at supporting mechanism and puts, the rotation that the horizontal plane was carried out through the rotatory belt of seed crystal in the bottom in seed crystal promotion chamber, the leading wheel is used for setting up the reel spool in rotatory central point and puts.

Further, the power mechanism comprises a speed reduction motor.

Furthermore, the end part of the seed crystal rotating belt is connected with a seed crystal rotating motor and a driving roller.

Furthermore, the guide wheel is at least one, a plurality of guide wheel sets are formed in an integrated mode, and the left end and the right end of the guide wheel are fixedly connected to the seed crystal lifting cavity.

Furthermore, by calculating the bending life of the seed crystal rope, the diameter ratio coefficient of the seed crystal rope to the fixed pulley is obtained, and the number of guide wheels in the guide wheel set is further determined.

Further, the section of the wire winding shaft is cylindrical, and an external wire groove of the wire winding shaft is of a spiral structure.

The invention changes the winding mode of the seed crystal rope, arranges the wire winding shaft at the rotating center, has no unbalance loading, further does not need excessive additional balance weight, has compact integral structure and reduced total weight, and is easier for the long-term stable operation of the single crystal furnace. The design of the light guide wheel group replaces the original large guide wheel mechanism, and the problem of the bending radius of the seed crystal rope which is larger and larger is well compatible, so that the structure tends to be more stable.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a front sectional view of an unbiased load seed crystal lifting device of the present invention.

FIG. 2 is a side view of the seed crystal lifting device without unbalance loading of the invention.

In the figure: 1. seed crystal ropes; 2. a wire winding shaft; 3. a guide wheel; 4. rotating the seed crystal by a belt; 5. a seed crystal rotating motor; 6. a power mechanism; 7. a seed crystal lifting cavity; 8. and (4) magnetic fluid.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, the embodiment discloses a seed crystal lifting device without unbalance loading, which comprises a seed crystal rope, a seed crystal winding shaft, a guide wheel and a power mechanism, wherein the bottom end of the seed crystal rope 1 is connected with a single crystal product, the top end of the seed crystal rope is wound on the seed crystal winding shaft 2 after bypassing the guide wheel, the seed crystal winding shaft is driven by the power mechanism 6, the seed crystal winding shaft is arranged at the central position in the seed crystal lifting cavity, the seed crystal lifting cavity is fixed at the central position of a supporting mechanism, the bottom of the seed crystal lifting cavity rotates in the horizontal plane through a seed crystal rotating belt 4, and the guide wheel 3 is used for arranging the seed crystal winding shaft at the rotating central position.

In this embodiment, the power mechanism includes a speed reduction motor, that is, a motor and a speed reducer connected thereto.

Specifically, the end of the seed crystal rotating belt is connected with a seed crystal rotating motor 5 and a driving roller, and the seed crystal rotating motor drives the seed crystal rotating belt to rotate in the horizontal plane through the driving roller.

The guide wheel 3 is at least one, is a plurality of time integrated guide wheel sets, the guide wheel is a fixed pulley, and specifically, the left end and the right end of the guide wheel are fixedly connected to the seed crystal lifting cavity 7. Through direction wheelset mechanism, will roll up the silk axle and place in the rotation center position, reduction rotating part weight that can show, and the biasing is put, need add extra balancing weight in the symmetry side to make rotating part dynamic balance.

The design of the guide wheel set needs to obtain the diameter ratio coefficient of the seed crystal rope and the fixed pulley by calculating the bending life of the seed crystal rope, and then the number of the guide wheels in the guide wheel set is determined. Therefore, according to different ratios, the seed crystal rope can be supported and guided by a larger bending radius in a single-wheel mode or a multi-wheel combined mode. The guide wheel set functions identically to a single fixed pulley but has the advantage that it can further reduce the mass and compression space of the device by having a more compact structure while providing the same large diameter bending radius support and guidance.

The section of the wire winding shaft is cylindrical, and an external wire groove of the wire winding shaft is of a spiral structure.

In an optional embodiment, the sidewall of the seed crystal lifting cavity can be provided with an access hole and an observation hole.

Typically, a stationary sealing means is also included, namely a magnetic fluid 8 and a mounting base, the magnetic fluid being disposed inside the mounting base.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.